From ce48250dbf5d93a0617c7683db9959f2fcacacc6 Mon Sep 17 00:00:00 2001
From: Mart Lubbers <mart@martlubbers.net>
Date: Fri, 18 Nov 2016 19:43:24 +0100
Subject: [PATCH] infrastructuur voor het lezen van taken

---
 int/int.c | 93 +++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 63 insertions(+), 30 deletions(-)

diff --git a/int/int.c b/int/int.c
index 6ef8cc4..2bf2cef 100644
--- a/int/int.c
+++ b/int/int.c
@@ -24,6 +24,7 @@
 #define die(s, ...) {fprintf(stderr, s, ##__VA_ARGS__); exit(1);}
 
 char tasks[MAXTASKS][MAXTASKSIZE] = {0};
+bool tasks_used[MAXTASKS] = {0};
 
 void killHandler(int i)
 {
@@ -44,15 +45,58 @@ bool input_available(int fd){
 	return FD_ISSET(fd, &fds);
 }
 
-int main(void)
+void read_message(int fd_in, int fd_out)
 {
+	//Find next task
 	uint8_t c;
-//	char taskindex = 0;
-//	int pl, sp, pc;
-//
-	int fd_in = 0;
-	int next_free_new_task = 0;
-	uint16_t tasklen = 0;
+	uint16_t tasklen;
+	uint8_t ct;
+
+	for(ct = 0; ct<MAXTASKS; ct++)
+		if(!tasks_used[ct])
+			break;
+	if(ct == MAXTASKS)
+		die("Trying to add too much tasks...\n");
+
+	debug("Receiving input for task %d\n", ct);
+	read(fd_in, &c, 1);
+	if((char) c == 's') {
+		debug("Receiving an sds\n");
+	} else if((char) c == 't'){
+		read(fd_in, &c, 1);
+		tasklen = 256*c;
+		read(fd_in, &c, 1);
+		tasklen += c;
+		if(tasklen > MAXTASKSIZE)
+			die("Task is too long: %d\n", tasklen);
+		for(int i = 0; i<tasklen; i++){
+			debug("Read %d\n", i);
+			read(fd_in, tasks[ct]+i, 1);
+			debug("t[][%i]: %d\n", i,
+				tasks[ct][i]);
+		}
+		//Return the task number for later removal
+		write(fd_out, (void *)&ct, 1);
+		debug("Received a task of length %d\n", tasklen);
+		tasks_used[ct] = true;
+	} else {
+		die("Unknown message: %c?\n", c);
+	}
+}
+
+void run_task(char *program)
+{
+
+	(void) program;
+}
+
+int main(void)
+{
+	int fd_in, fd_out;
+	int ct;
+
+	fd_in = fileno(stdin);
+	fd_out = fileno(stdout);
 
 	//Register signal handler
 	if(signal(SIGINT, killHandler) == SIG_ERR){
@@ -63,32 +107,21 @@ int main(void)
 	}
 
 	while(true){
+		//Check for new tasks
 		if(input_available(fd_in)){
-			printf("Receiving input\n");
-			read(fd_in, &c, 1);
-			if((char) c == 's'){
-				debug("Receiving an sds\n");
-			} else if((char) c == 't'){
-				read(fd_in, &c, 1);
-				tasklen = 256*c;
-				read(fd_in, &c, 1);
-				tasklen += c;
-				if(tasklen > MAXTASKSIZE){
-					die("Task is too long: %d\n", tasklen);
-				}
-				for(int i = 0; i<tasklen; i++){
-					debug("Read %d\n", i);
-					read(fd_in, tasks[next_free_new_task]+i, 1);
-					read(fd_in, tasks[next_free_new_task]+i, 1);
-					debug("t[][%i]: %d\n", i, tasks[next_free_new_task][i]);
-				}
-				debug("Receiving a task of length %d\n", tasklen);
-			} else {
-				die("Unknown message: %c?\n", c);
-			}
+			read_message(fd_in, fd_out);
 			exit(1);
 		}
-		usleep(1);
+		//Run tasks
+		for(ct = 0; ct<MAXTASKS; ct++){
+			if(!tasks_used[ct]){
+				debug("Task %d not implemented\n", ct);
+				continue;
+			}
+			debug("Going to execute task %d\n", ct);
+			run_task(tasks[ct]);
+		}
+		usleep(10);
 	}
 
 /*	//Read program
-- 
2.20.1